Thermal power plant flame detection installation debugging device and debugging method

Abstract

The invention relates to the technical field of thermal power plant equipment installation and debugging, in particular to a thermal power plant flame detection installation and debugging device.The thermal power plant flame detection installation and debugging device comprises a flame detection probe assembly which comprises a flame detection probe body and an installation sleeve, and the front end of the installation sleeve is connected with an extension sleeve; the horizontal calibration assembly comprises a first light emitting device and a horizontal calibration sleeve, and the first light emitting device is used for emitting a calibration light beam to guide the horizontal calibration sleeve to be aligned with the burner nozzle; and the axis of the extension sleeve coincides with the detection sight line of the flame detection probe. The movable horizontal reference is established on the central axis of the boiler, the horizontal reference and the detection sight line of the flame detection probe form the spatial intersection point, aiming of the flame detection probe is converted into accurate alignment based on the geometric reference from experience-dependent fuzzy alignment, it is ensured that the probe is always aligned with a stable combustion area with the highest flame intensity, and the flame detection accuracy is improved. And the problems of weak signal and false alarm caused by lengthening of the black dragon area are fundamentally solved.

Description

Technical Field

[0001] This application relates to the field of thermal power plant equipment installation and commissioning technology, and in particular to a thermal power plant flame detection installation and commissioning device and commissioning method. Background Technology

[0002] In the operation of boilers in thermal power plants, flame detection is a crucial link in ensuring furnace safety. It is used to monitor the presence and intensity of the burner flame in the furnace in real time. Once flameout is detected, the system must immediately trigger a shutdown (i.e., "shutdown"), cutting off the fuel supply to prevent fuel accumulation in the furnace and subsequent serious accidents such as deflagration. Therefore, flame detection probes must be aligned with the flame combustion zone to obtain reliable flame signals, avoiding abnormal boiler shutdown due to misjudgment of flameout. In thermal power plants, the safe and stable operation of boilers is of paramount importance.

[0003] However, actual boiler operating conditions often deviate from design conditions, and the type of coal actually burned often differs from the design and verification coal types. When the type of coal used changes, the combustion conditions inside the burners in the furnace will also change. For example, in actual operation, thermal power plants often need to use low-quality pulverized coal or mixed coal as fuel. When such fuels burn, the black dragon zone (the area rich in incompletely burned pulverized coal) of the flame will be significantly longer, causing the line of sight of the visible light flame detector installed according to traditional procedures to easily focus on the black dragon zone or the front part of the initial combustion zone. Because the flame intensity in the above area is extremely weak, the flame detection system is prone to "no flame" misjudgment, triggering the boiler emergency shutdown protection, which not only affects the continuity of power generation, but may also cause the risk of deflagration due to the continuous entry of fuel into the furnace.

[0004] In addition, the existing flame detector installation and commissioning mostly rely on manual experience to adjust its angle and position, lacking a dedicated positioning device, resulting in low installation accuracy, long commissioning cycle, and difficulty in adapting to the working conditions of different coal types and different burner structures.

[0005] Therefore, there is an urgent need for a flame detection installation and debugging device and method that can accurately locate the flame combustion zone and adapt to multiple working conditions, in order to solve the technical problems of poor reliability of flame detection signals and low debugging efficiency in the existing technology. Summary of the Invention

[0006] This application provides a fire detector installation and commissioning device and method for thermal power plants, which solves the problems that existing fire detector installation and commissioning mostly rely on manual experience and lack dedicated positioning devices, resulting in low installation accuracy, long commissioning cycle, and easy misjudgment of "no fire".

[0007] This application provides a fire detection installation and commissioning device for thermal power plants, comprising:

[0008] A fire detector probe assembly includes a fire detector probe body and a mounting sleeve, wherein an extension sleeve is connected to the front end of the mounting sleeve;

[0009] A horizontal calibration assembly, comprising a first light-emitting device and a horizontal calibration sleeve, wherein the first light-emitting device is used to emit a calibration beam to guide the horizontal calibration sleeve to align with the burner nozzle;

[0010] The axis of the extension sleeve coincides with the detection line of the fire detector probe body. The extension sleeve can adjust its length along its axis to cooperate with the horizontal calibration sleeve to determine the installation angle of the fire detector probe body.

[0011] Preferably, the mounting sleeve is detachably disposed at the front end of the fire detector probe body, and a second light-emitting device is also disposed inside the mounting sleeve.

[0012] Preferably, the second light-emitting device is used to emit an angle calibration beam, which coincides with the axis of the extension sleeve.

[0013] Preferably, it also includes an extendable bracket, wherein the first light-emitting device is installed inside the boiler via the extendable bracket, and the extendable bracket can drive the first light-emitting device to rotate around the central axis of the boiler or to move up and down along the central axis of the boiler.

[0014] Preferably, the horizontal calibration sleeve comprises:

[0015] A basic cylindrical section, one end of which is horizontally connected to the first light-emitting device;

[0016] At least one splicing tube segment is provided, and the other end of the splicing tube segment is detachably connected to the other end of the base tube segment;

[0017] The overall length of the horizontal calibration sleeve can be adjusted by adding, removing, or replacing spliced ​​sleeve sections of different lengths.

[0018] Preferably, the length of the basic cylindrical section is less than or equal to the distance from the end of the flame burnout zone to the first light-emitting device under standard conditions;

[0019] The overall adjustable range of the length of the horizontal calibration sleeve is:

[0020] The overall length of the horizontal calibration sleeve is less than or equal to the distance from the center of the stable combustion zone to the first light-emitting device, and the horizontal calibration sleeve is greater than the distance from the starting end of the burnout zone to the beam emission end of the second light-emitting device.

[0021] Preferably, the installation angle of the fire detector probe body can be determined by adjusting the pitch angle so that the outer surface of the extension sleeve contacts the end of the horizontal calibration sleeve or by focusing the angle calibration beam on the end of the horizontal calibration sleeve.

[0022] Preferably, the extension sleeve and / or the horizontal calibration sleeve are made of lightweight refractory material.

[0023] This application also provides a commissioning method for a fire detection installation and commissioning device for thermal power plants based on any of the above claims, including:

[0024] The first light-emitting device is installed at the central axis of the boiler to emit a horizontal calibration beam;

[0025] The horizontal calibration sleeve is guided to align with the target burner nozzle by the horizontal calibration beam;

[0026] Install the flame detector body, connect the extension sleeve to the front end of the flame detector body, and adjust the length of the extension sleeve.

[0027] Adjust the pitch angle of the fire detector probe body so that the extension sleeve contacts the end of the horizontal calibration sleeve or the angle calibration beam is focused on its end.

[0028] Secure the fire detector probe body and complete the installation and debugging.

[0029] Preferably, the method further includes adjusting the overall length of the horizontal calibration sleeve according to the type of coal, so that the detection line of the flame detector body can be focused on the position of the corresponding stable flame zone.

[0030] The beneficial effects of this application are as follows:

[0031] The fire detection installation and commissioning device for thermal power plants disclosed in this application establishes a movable horizontal reference along the central axis of the boiler, forming a spatial intersection with the detection line of the fire detection probe. This transforms the aiming of the fire detection probe from "fuzzy alignment" based on experience to "precise alignment" based on a geometric reference, ensuring that the probe is always aligned with the stable combustion zone with the highest flame intensity. This fundamentally solves the problems of weak signal and false alarms caused by the elongation of the black dragon zone.

[0032] Furthermore, through the adjustable-length horizontal calibration sleeve and the movable first light-emitting device, the actual detection point can be flexibly adjusted according to the different flame patterns formed by different burner types, different layers, and different coal types, greatly enhancing its accuracy and universality.

[0033] In particular, by providing a clear and quantifiable set of dedicated tools and commissioning methods, it replaces the traditional inefficient and subjective installation methods. A single reference device can serve all the burners in the furnace, shortening the commissioning time, reducing reliance on the experience of commissioning personnel, and facilitating its widespread application. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0035] Figure 1 This is a schematic diagram of the flame combustion state in a boiler;

[0036] Figure 2 A schematic diagram of the overall architecture of the fire detection installation and commissioning device for thermal power plants provided in the embodiments of this application;

[0037] Figure 3 A flowchart illustrating the fire detection installation and commissioning method for thermal power plants provided in this application embodiment.

[0038] Figure label:

[0039] 1. Flame detector probe body; 2. Extension sleeve; 3. First light-emitting device; 4. Horizontal calibration sleeve; 41. Basic cylinder section; 42. Splicing cylinder section; 5. Burner nozzle; 6. Extendable bracket; 7. Mounting sleeve; 8. Second light-emitting device. Detailed Implementation

[0040] The technical solutions of this application will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0041] The following is combined Figure 1-3 This application describes the fire detection installation and commissioning device and commissioning method for thermal power plants provided in the embodiments of this application.

[0042] like Figure 1 As shown, in actual use, the flame of pulverized coal combustion will be divided into the black dragon zone, the initial combustion zone (hereinafter referred to as the initial combustion zone), the stable combustion zone (hereinafter referred to as the stable combustion zone), and the burnout zone from the nozzle. Conventional flame detection equipment will detect the initial combustion zone and the stable combustion zone of the flame. However, when the boiler is started up for the first time or when inferior pulverized coal and mixed coal are used, the pulverized coal combustion is incomplete. At this time, the black dragon zone of the flame becomes longer, and the position of the initial combustion zone and the stable combustion zone shifts towards the center of the furnace. The flame detection equipment cannot detect the area required by the design, the flame detection signal fluctuates more, and even the "no flame" misjudgment occurs, triggering the boiler emergency shutdown protection, which seriously affects the normal operation of the boiler.

[0043] Reference Figure 2As shown, to solve the above problems, the fire detection installation and commissioning device for thermal power plants provided in this application mainly includes two parts: a fire detection probe assembly and a horizontal calibration assembly. The fire detection probe assembly includes a fire detection probe body 1, an installation sleeve 7, and an extension sleeve 2. The fire detection probe body 1 is installed at the secondary air duct opening on the boiler wall. The installation sleeve 7 is detachably connected to the front end of the fire detection probe body 1 and has a second light-emitting device 8 inside. The second light-emitting device 8 is used to emit an angle calibration beam that coincides with the axis of the extension sleeve 2. When the fire detection probe body 1 itself is a laser fire detection probe or can emit a concentrated visible beam, the second light-emitting device 8 can be omitted.

[0044] The extension sleeve 2 is detachably connected to the front end of the mounting sleeve 7 by threads or snaps. The extension sleeve 2 is a hollow straight tube with adjustable length. Its axis represents the actual detection line of the fire detector probe body 1. The extension sleeve 2 is preferably made of lightweight refractory material to reduce the adjustment burden and withstand high temperature to a certain extent, preventing deformation during the debugging process.

[0045] Specifically, the extension sleeve 2 is a hollow sleeve that can extend and retract on its own or is formed by screwing together multiple sections of pipe, and can achieve stepless or stepped adjustment of length. In this embodiment, a hollow sleeve with a slightly thinner inner diameter is used as the extension sleeve 2 and is connected to the front end of the mounting sleeve 7 by threads. It should be noted that during assembly, it is necessary to ensure that the axis of the extension sleeve 2 coincides with the detection line of the optical sensor inside the fire detector probe body 1, or coincides with the straight laser beam emitted by the second light-emitting device 8.

[0046] In some specific embodiments, the horizontal calibration component is used to establish a precise, movable horizontal reference. The component includes a first light-emitting device 3 and a horizontal calibration sleeve 4, wherein both the first light-emitting device 3 and the second light-emitting device 8 can be laser emitters or devices capable of emitting a focused beam. The first light-emitting device 3 is used to emit a horizontal calibration beam to guide the horizontal calibration sleeve 4 to be horizontally aligned with the burner nozzle 5 to be observed. In this embodiment, both the first light-emitting device 3 and the second light-emitting device 8 are high-collimation visible light laser pointers. The first light-emitting device 3 is installed inside the boiler via an extendable bracket 6 or a temporarily constructed mounting platform. When using the extendable bracket 6, the extendable bracket can drive the second light-emitting device 8 installed on it to move vertically up and down along the central axis of the boiler or rotate around the central axis, so as to position the first light-emitting device 3 near the central axis of the boiler and guide the horizontal calibration beam emitted by it to the direction of any corresponding burner nozzle 5. By allowing the extendable bracket to drive the first light-emitting device 3 to rotate around the central axis of the boiler, the first light-emitting device 3 can be aligned with burner nozzles 5 at different circumferential positions. By allowing the extendable bracket to drive the first light-emitting device 3 to move up and down along the central axis of the boiler, it can be used to calibrate burners arranged at different heights.

[0047] In some specific embodiments, such as Figure 2 As shown, the horizontal calibration sleeve 4 adopts a modular design and is hollow as a whole. It includes a base cylinder section 41 connected to the front end of the first light-emitting device 3, and at least one splicing cylinder section 42. The base cylinder section 41 and multiple splicing cylinder sections 42 of different lengths are included. One end of the base cylinder section 41 is horizontally aligned and connected to the beam emitting end of the first light-emitting device 3 through a quick interface or corresponding bracket. The base cylinder section 41 and the splicing cylinder section 42 are detachably connected by threads, snaps, etc. The overall length of the horizontal calibration sleeve 4 can be adjusted by increasing or decreasing the number of splicing cylinder sections 42 or by replacing splicing cylinder sections 42 of different lengths.

[0048] The length of the basic cylinder section 41 is no greater than the distance from the end of the flame burnout zone to the first light-emitting device 3 under standard conditions. The overall length of the horizontal calibration sleeve 4 should be greater than the distance from the beginning of the burnout zone to the first light-emitting device 3 when the coal currently used in the boiler is burning, and less than or equal to the distance from the center of the stable combustion zone to the first light-emitting device 3 when the coal currently used in the boiler is burning. Preferably, it is the distance from the center of the stable combustion zone of the flame to the first light-emitting device 3 when the coal currently used in the boiler is burning, so as to ensure that the endpoint of the calibration baseline can always fall within the critical detection range from the initial combustion zone to the stable combustion zone of the flame. The horizontal calibration sleeve 4 is also preferably made of lightweight refractory material.

[0049] During installation, firstly, the mounting end face of the extendable bracket 6 is kept horizontal, allowing the first light-emitting device 3 mounted on it to emit a horizontal laser beam as a horizontal calibration beam for calibrating the horizontal calibration sleeve 4. Then, based on the design position of the target burner nozzle 5 and the combustion characteristics of the coal required for the current boiler, the horizontal calibration sleeve 4 of the appropriate length is assembled and connected to the first light-emitting device 3. After the horizontal calibration beam emitted by the first light-emitting device 3 passes through the central axis of the horizontal calibration sleeve 4, the extendable bracket 6 is finely adjusted until the horizontal calibration beam emitted from the end of the sleeve 4 precisely falls at the center position of the corresponding burner nozzle 5, completing the installation and debugging of the horizontal calibration component. At this point, the axis of the horizontal calibration sleeve 4 becomes a horizontal spatial reference line, and its end furthest from the first light-emitting device 3 precisely falls within the stable combustion zone.

[0050] Subsequently, the flame detector probe assembly is initially installed on the reserved hole at the secondary air duct opening of the boiler. Based on the measured distance from the installation point to the end face of the horizontal calibration sleeve 4, the length of the extension sleeve 2 is adjusted so that its extension length roughly matches the distance. Then, the pitch angle of the flame detector probe body 1 is slowly adjusted. When the outer surface of the tip of the extension sleeve 2 or the angle calibration beam emitted by the second light-emitting device 8 installed in the flame detector probe assembly contacts the outer end face of the horizontal calibration sleeve 4, the adjustment is stopped. This contact point means that the axis of the extension sleeve 2, i.e. the probe line of sight, has intersected with the axis of the horizontal calibration sleeve 4 and the intersection point falls within the stable combustion area of ​​the flame when the current coal type is burning. At this time, the corresponding fixing bolts can be tightened to complete the installation and debugging of the flame detector probe body 1.

[0051] Reference Figure 3 As shown, this application also provides a method for installing and commissioning a thermal power plant fire detector based on any of the above-mentioned thermal power plant fire detector installation and commissioning devices, comprising:

[0052] Step S1: Install the first light-emitting device 3 at the central axis of the boiler and emit a horizontal calibration beam;

[0053] Step S2: Guide the horizontal calibration sleeve 4 with the horizontal calibration beam to align with the target burner nozzle 5;

[0054] Step S3: Install the fire detector body 1, connect the extension sleeve 2 to the front end of the fire detector body 1, and adjust the length of the extension sleeve 2.

[0055] Step S4: Adjust the pitch angle of the fire detector probe body 1 so that the extension sleeve 2 contacts the end of the horizontal calibration sleeve 4 or the angle calibration beam is focused on its end.

[0056] Step S5: Fix the fire detector probe body 1 to complete the installation and debugging.

[0057] Specifically, step S1: establish a horizontal reference, insert the extendable bracket with the first light-emitting device 3 into the boiler, and adjust its position to the central axis of the boiler; then, rotate and / or raise the first light-emitting device 3 by the extendable bracket so that the horizontal calibration beam emitted by it can be accurately aligned with the center position of the target burner nozzle 5 that needs to be adjusted.

[0058] Step S2: Set the target point. Install the horizontal calibration sleeve 4 at the front end of the first light-emitting device 3. Estimate the position of the stable flame zone based on the type of coal to be used and its combustion conditions. Then, adjust the overall length of the horizontal calibration sleeve 4 by adding, subtracting or replacing the splicing sleeve section 42 so that its end can be located within the preset stable flame zone. At this time, the end of the horizontal calibration sleeve 4 constitutes a visible and physical "target positioning point".

[0059] Step S3: Debug the flame detector probe. Install the flame detector probe body 1 into place and connect the extension sleeve 2. Adjust the pitch angle of the flame detector probe body 1 so that its detection line of sight falls on the "target positioning point" formed in step S2. The adjustment method includes:

[0060] Physical contact method: Adjust the body 1 of the fire detector probe and appropriately extend the length of the extension sleeve 2 so that the outer surface of the extension sleeve 2 at its front end just contacts the end of the horizontal calibration sleeve 4. At this time, the axis of the extension sleeve 2 will inevitably pass through the "target positioning point" formed by the end of the horizontal calibration sleeve 4, that is, the detection line of sight is accurately aligned with the stable combustion zone.

[0061] Optical focusing method: Activate the second light-emitting device 8 set in the mounting sleeve 7, adjust the angle of the fire detector probe body 1 so that the angle calibration beam emitted by it is precisely focused on the end of the horizontal calibration sleeve 4, which also achieves precise alignment of the detection line of sight.

[0062] Step S4: After completing the debugging and confirming the alignment, lock the installation position of the flame detector body 1 using the corresponding fixing device. Then, install and debug the flame detector body 1 and other components except for the flame detector body 1.

[0063] Furthermore, in step S2, the length of the horizontal calibration sleeve 4 can be dynamically adjusted according to the type of coal to be used. For example, when the coal to be burned is low-quality coal or mixed coal, which causes the black dragon zone to become longer, the length of the horizontal calibration sleeve 4 can be appropriately reduced to push the target positioning point back to a deeper stable combustion zone, thereby ensuring that the flame detector probe can always detect the strongest flame signal.

[0064] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0065] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0066] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between components; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0067] In this application, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0068] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A fire detection installation and commissioning device for thermal power plants, characterized in that, include: The fire detector probe assembly includes a fire detector probe body (1) and a mounting sleeve (7), wherein the front end of the mounting sleeve (7) is connected to an extension sleeve (2); A horizontal calibration assembly, comprising a first light-emitting device (3) and a horizontal calibration sleeve (4), wherein the first light-emitting device (3) is used to emit a calibration beam to guide the horizontal calibration sleeve (4) to align with the burner nozzle (5); The axis of the extension sleeve (2) coincides with the detection line of the fire detector probe body (1). The extension sleeve (2) can adjust its length along its axis to cooperate with the horizontal calibration sleeve (4) to determine the installation angle of the fire detector probe body (1).

2. The thermal power plant flame detection installation and commissioning device according to claim 1, characterized in that, The mounting sleeve (7) is detachably disposed at the front end of the fire detector probe body (1), and a second light-emitting device (8) is also disposed inside the mounting sleeve (7).

3. The thermal power plant flame detection installation and commissioning device according to claim 2, characterized in that, The second light-emitting device (8) is used to emit an angle calibration beam that coincides with the axis of the extension sleeve (2).

4. The thermal power plant flame detection installation and commissioning device according to claim 3, characterized in that, It also includes an extendable bracket. The first light-emitting device (3) is installed inside the boiler through the extendable bracket. The extendable bracket can drive the first light-emitting device (3) to rotate around the central axis of the boiler or to rise and fall along the central axis of the boiler.

5. The thermal power plant flame detection installation and commissioning device according to claim 4, characterized in that, The horizontal calibration sleeve (4) includes: A basic cylindrical section, one end of which is horizontally connected to the first light-emitting device (3); At least one splicing tube segment is provided, and the other end of the splicing tube segment is detachably connected to the other end of the base tube segment; The overall length of the horizontal calibration sleeve can be adjusted by adding, removing, or replacing spliced ​​sleeve sections of different lengths.

6. The thermal power plant flame detection installation and commissioning device according to claim 5, characterized in that, The length of the basic cylindrical section is less than or equal to the distance from the end of the flame burnout zone to the first light-emitting device (3) under standard conditions; The overall length adjustment range of the horizontal calibration sleeve (4) is: The overall length of the horizontal calibration sleeve (4) is less than or equal to the distance from the center of the stable combustion zone to the first light-emitting device (3), and the horizontal calibration sleeve (4) is greater than the distance from the starting end of the burnout zone to the beam emission end of the second light-emitting device (8).

7. The thermal power plant flame detection installation and commissioning device according to claim 6, characterized in that, The installation angle of the fire detector probe body (1) can be determined by adjusting the pitch angle so that the outer surface of the extension sleeve (2) contacts the end of the horizontal calibration sleeve (4) or the angle calibration beam is focused on the end of the horizontal calibration sleeve (4).

8. The fire detection installation and commissioning device for thermal power plants according to claim 1, characterized in that, The extension sleeve (2) and / or the horizontal calibration sleeve (4) are made of lightweight refractory material.

9. A method for installing and commissioning a fire detector in a thermal power plant, based on the fire detector installation and commissioning device for thermal power plants according to any one of claims 1-8, characterized in that, include: The first light-emitting device (3) is installed at the central axis of the boiler to emit a horizontal calibration beam; The horizontal calibration sleeve (4) is guided by the horizontal calibration beam to align with the target burner nozzle (5); Install the fire detector body (1), connect the extension sleeve (2) to the front end of the fire detector body (1), and adjust the length of the extension sleeve (2). Adjust the pitch angle of the fire detector probe body (1) so that the extension sleeve (2) contacts the end of the horizontal calibration sleeve (4) or the angle calibration beam is focused on its end. Fix the fire detector probe body (1) and complete the installation and debugging.

10. The method for installing and commissioning a fire detector in a thermal power plant according to claim 9, characterized in that, It also includes adjusting the overall length of the horizontal calibration sleeve (4) according to the type of coal so that the detection line of the flame detector body (1) can be focused on the position of the corresponding flame stable combustion zone.

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